In the Metroplex, I found a set of six Borderlands Little Books at Half Price Books for $120. I bought that, incorporated three I didn’t have into my own library, and am listing the other three (including their Ligotti volume, which is worth more than $120 all on its own these days) through Lame Excuse Books.
Malerman, Josh. A Little Red Book of Requests. Borderlands Press, 2019. First edition hardback, #290 of 500 signed copies, a Fine copy, sans dust jacket, as issued. This came out the year after the Bird Box movie, so I imagine it disappeared very quickly.
Nolan, William F. A Little Gray Book of Shadows. Borderlands Press, 2018. First edition hardback, #290 of 500 signed copies, a Fine copy, sans dust jacket, as issued.
Waggoner, Tim. A Little Aqua Book of Marine Tales. Borderlands Press, 2018. First edition hardback, #290 of 500 signed copies, a Fine copy, sans dust jacket, as issued.
I have enough of these now that I’m thinking I should try to pick up a full set. Of the really “difficult” ones, I think I only lack the Gaiman volume.